Can you figure out this riddle?

you are on a horse galloping at a constant speed. On your right is a sharp drop off and on your left side is an elephant traveling at the same speed as you. directly in front of you is a galloping kangaroo and your horse is unable to overtake it. behind you is a lion running at the same speed as you and the kangaroo. what must you do to get out of this extremely dangerous situation???????